Hi Grumpy, that is right, am unable to put anything on carby without it stuffing around, have even tried a straight peice of pipe, still no good. There is nothing phisicaly wrong with either the hose or airfilter/box, which has got me completely stumped. There shouldnt be any difference whether it is sucking air directly from carby, nothing attached, or through the hose/airfilter once attached. Oh and yes i will stay away from the carby for now on.